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Crypts, or cervix glands, grow in number and increase in size to store more sperm.

Lifespan depends on where sperm land after ejaculation.

But underwear has almost no effect on your sperm.

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Barely years ago, it was considered a major scientific breakthrough when scientists came up with the idea that a fully formed, tiny human inhabited the head of each sperm — totally debunked and untrue.

And of that 40 percent, not all make it to the egg.

Lifespan depends on where sperm land after ejaculation.

In this course, some sperm attach to oviduct epithelial cells in the fallopian tubes or get stored in tiny chambers called crypts until fertilization primetime:

The first thing to learn here is that semen scent and taste, like that of many of your bodily fluids, are influenced by overall genetics, diet, and lifestyle.